The MRI scans will be performed on CE-approved MRI scanners at Aarhus University Hospital, Noerrebrogade 44, 8000 Aarhus C, Denmark. A standard protocol for MRI will be used containing a structural T1, a susceptibility weighted image (SWI) and T2 FLAIR sequence with the purpose to visualize anatomy, micro hemorrhages and edema. It is expected that the findings from the standard protocol will be present in the acute stage but only for some at follow-up.